scholarly journals EVALUATION OF THE EFFECTIVENESS OF CHANNEL LEVEL PROTOCOLL PARAMETERS

2020 ◽  
Vol 2020 (3) ◽  
pp. 165-171
Author(s):  
Sh Karimov ◽  
◽  
Y Cho
Keyword(s):  
Data Transfer ◽  
Window Size ◽  
Error Correcting Codes ◽  
Data Transfer Rate ◽  
Nominal Data ◽  
Data Link ◽  
Frame Size ◽  
Time Out ◽  
Link Layer Protocol ◽  
Information Frame

There is justification for a simulation model for assessing channel level protocols. The effect of the data link layer protocol parameters on the data transfer function is analyzed. The data link protocol parameters have been specified and split into two categories, which are customizable and not configurable. In the work, parameters such as the acceptable information frame size are related in detail to the tunable data link protocol parameter; service personnel format; time-out value; unconfirmed frame window size, etc. That nominal data transfer rate, error-correcting codes used, etc. are non-configurable parameters.

Design and Implementation of a Multi-Channel HDLC Protocol Controller Based on FPGA

2011 ◽  
Vol 383-390 ◽  
pp. 6840-6845 ◽  
Author(s):  
Yong Hong Gu ◽  
Wei Huang ◽  
Qiao Li Yang
Keyword(s):  
Error Control ◽  
Data Transfer ◽  
Full Duplex ◽  
Programmable Logic ◽  
Data Link ◽  
Total Cost ◽  
Half Duplex ◽  
Level Data ◽  
Layer 2 ◽  
High Level

To transmit and receive data over any network successfully, a protocol is required to manage the flow. High-level Data Link Control (HDLC) protocol is defined in Layer 2 of OSI model and is one of the most commonly used Layer 2 protocol. HDLC supports both full-duplex and half-duplex data transfer. In addition, it offers error control and flow control. Currently on the market there are many dedicated HDLC chips, but these chips are neither of control complexity nor of limited number of channels. This paper presents a new method for implementing a multi-channel HDLC protocol controller using Altera FPGA and VHDL as the target technology. Implementing a multi-channel HDLC protocol controller in FPGA offers the flexibility, upgradability and customization benefits of programmable logic and also reduces the total cost of every project which involves HDLC protocol controllers.

Miniature Two-Axis Actuator for High-Data-Transfer-Rate Optical Data Storage System

2002 ◽  
Vol 41 (Part 1, No. 3B) ◽  
pp. 1804-1807 ◽  
Author(s):  
Gakuji Hashimoto ◽  
Hiroki Shima ◽  
Kenji Yamamoto ◽  
Tsutomu Maruyama ◽  
Takashi Nakao ◽  
...  
Keyword(s):  
Data Storage ◽  
Transfer Rate ◽  
Data Transfer ◽  
Storage System ◽  
Optical Data Storage ◽  
Optical Data ◽  
Data Transfer Rate ◽  
High Data ◽  
Data Storage System

scholarly journals DATA TRANSFER RATE IN NOISY CHANNELS OF WIRELESS NETWORKS

2021 ◽  
Vol 1 (132) ◽  
pp. 136-144
Author(s):  
Volodymyr Khandetskyi ◽  
Dmutro Sivtsov ◽  
Kostjantun Panin
Keyword(s):  
Wireless Networks ◽  
Transfer Rate ◽  
New Technologies ◽  
Data Transfer ◽  
Data Transfer Rate ◽  
Noisy Channels ◽  
Transfer Rates ◽  
Wide Range ◽  
Original Frame ◽  
Fragmented Data

Analysis of new technologies IEEE 802.11ac/ax of wireless networks showed that increasing their noise immunity is an actual task. The article studies the efficiency of fragmented data frames transmission. Comparison of the efficiencies in the case of retransmission of the corrupted original frame and in the case of its fragmentation in a wide range of the physical data transfer rates is carried out.

scholarly journals Identifying Opportunities for Exploiting Cross-Layer Interactions in Adaptive Wireless Systems

2007 ◽  
Vol 2007 ◽  
pp. 1-11 ◽  
Author(s):  
Troy Weingart ◽  
Douglas C. Sicker ◽  
Dirk Grunwald
Keyword(s):  
Error Detection ◽  
Software Defined Radio ◽  
Forward Error Correction ◽  
Instant Messaging ◽  
Transport Layer ◽  
Cross Layer ◽  
File Transfer ◽  
Data Link ◽  
Frame Size ◽  
Forward Error

The flexibility of cognitive and software-defined radio heralds an opportunity for researchers to reexamine how network protocol layers operate with respect to providing quality of service aware transmission among wireless nodes. This opportunity is enhanced by the continued development of spectrally responsive devices—ones that can detect and respond to changes in the radio frequency environment. Present wireless network protocols define reliability and other performance-related tasks narrowly within layers. For example, the frame size employed on 802.11 can substantially influence the throughput, delay, and jitter experienced by an application, but there is no simple way to adapt this parameter. Furthermore, while the data link layer of 802.11 provides error detection capabilities across a link, it does not specify additional features, such as forward error correction schemes, nor does it provide a means for throttling retransmissions at the transport layer (currently, the data link and transport layer can function counterproductively with respect to reliability). This paper presents an analysis of the interaction of physical, data link, and network layer parameters with respect to throughput, bit error rate, delay, and jitter. The goal of this analysis is to identify opportunities where system designers might exploit cross-layer interactions to improve the performance of Voice over IP (VoIP), instant messaging (IM), and file transfer applications.

Domain and write–read characteristics for magnetic field modulated magneto‐optical disk with high data transfer rate

1989 ◽  
Vol 66 (12) ◽  
pp. 6138-6143 ◽  
Author(s):  
Harukazu Miyamoto ◽  
Toshio Niihara ◽  
Hirofumi Sukeda ◽  
Masahiko Takahashi ◽  
Takeshi Nakao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transfer Rate ◽  
Data Transfer ◽  
Optical Disk ◽  
Data Transfer Rate ◽  
High Data

scholarly journals Theoretical Study of a Surface Collinear Holographic Memory

Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 70
Author(s):  
Hirayama ◽  
Fujimura ◽  
Umegaki ◽  
Tanaka ◽  
Shimura
Keyword(s):  
Data Storage ◽  
Transfer Rate ◽  
Data Transfer ◽  
Coefficient Of Thermal Expansion ◽  
Storage System ◽  
Reconstructed Image ◽  
Data Transfer Rate ◽  
Holographic Memory ◽  
High Data ◽  
Volume Holograms

Holographic memory is currently attracting attention as a data storage system capable of achieving a data transfer rate of about 105~106105~106 times that of an optical disc such as Blu-ray disc. In conventional holographic memory, data is generally recorded by optical writing using volume holograms. However, a volume hologram has the problem not only that it is required to have high mechanical accuracy of a system and low coefficient of thermal expansion of a recording medium, because reconstruction tolerance is extremely low, but also that duplicating time efficiency is poor because whole data cannot be recorded at once. In this paper we proposed surface holographic memory that achieved a high data transfer rate, stable readout performance, and collective duplication by expressing holograms with fine surface asperity. Furthermore, the theoretical formulas of recording and reconstruction processes in the proposed system were derived and the reconstruction characteristics of the hologram were evaluated by numerical simulation. As a result, the proposed method generated reconstructed image readout with sufficient signal for a single page recording. However, the reconstructed image had noise, which was particular to a surface holographic memory.

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